EP2750258A3 - Methods for locating ground faults and insulation degradation condition in energy conversion systems - Google Patents

Methods for locating ground faults and insulation degradation condition in energy conversion systems Download PDF

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Publication number
EP2750258A3
EP2750258A3 EP20130188933 EP13188933A EP2750258A3 EP 2750258 A3 EP2750258 A3 EP 2750258A3 EP 20130188933 EP20130188933 EP 20130188933 EP 13188933 A EP13188933 A EP 13188933A EP 2750258 A3 EP2750258 A3 EP 2750258A3
Authority
EP
European Patent Office
Prior art keywords
energy conversion
methods
insulation degradation
conversion system
conversion systems
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20130188933
Other languages
German (de)
French (fr)
Other versions
EP2750258A2 (en
EP2750258B1 (en
Inventor
Mohammed Agamy
Maja Harfman Todorovic
Ahmed Elasser
Anthony William Galbraith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of EP2750258A2 publication Critical patent/EP2750258A2/en
Publication of EP2750258A3 publication Critical patent/EP2750258A3/en
Application granted granted Critical
Publication of EP2750258B1 publication Critical patent/EP2750258B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/46—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to frequency deviations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Locating Faults (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Photovoltaic Devices (AREA)
  • Inverter Devices (AREA)

Abstract

Methods for determining a ground fault or insulation degradation condition within energy conversion systems are described. A method for determining a ground fault within an energy conversion system 100 may include, in part, a comparison of baseline waveform of differential current to a waveform of differential current during operation for a plurality of DC current carrying conductors in an energy conversion system. A method for determining insulation degradation within an energy conversion system may include, in part, a comparison of baseline frequency spectra of differential current to a frequency spectra of differential current transient at start-up for a plurality of DC current carrying conductors in an energy conversion system. In one embodiment, the energy conversion system may be a photovoltaic system.
EP13188933.9A 2012-12-26 2013-10-16 Methods for locating ground faults and insulation degradation condition in energy conversion systems Active EP2750258B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/726,730 US9103865B2 (en) 2012-12-26 2012-12-26 Methods for locating ground faults and insulation degradation condition in energy conversion systems

Publications (3)

Publication Number Publication Date
EP2750258A2 EP2750258A2 (en) 2014-07-02
EP2750258A3 true EP2750258A3 (en) 2014-10-01
EP2750258B1 EP2750258B1 (en) 2019-07-17

Family

ID=49385132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13188933.9A Active EP2750258B1 (en) 2012-12-26 2013-10-16 Methods for locating ground faults and insulation degradation condition in energy conversion systems

Country Status (4)

Country Link
US (1) US9103865B2 (en)
EP (1) EP2750258B1 (en)
JP (1) JP2014128191A (en)
CN (1) CN103901318B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6930370B2 (en) * 2017-10-30 2021-09-01 オムロン株式会社 Ground fault detector
JP6567230B1 (en) * 2019-01-08 2019-08-28 三菱電機株式会社 Arc ground fault detection method
CN112636694B (en) * 2019-09-24 2022-06-14 华为数字能源技术有限公司 Photovoltaic power generation system and method
CN111722055B (en) * 2020-05-21 2021-06-25 昆明理工大学 Single-pole grounding fault identification method for MMC direct current transmission line based on perceptual fuzzy identification
CN112327055B (en) * 2020-11-09 2024-05-14 爱士惟新能源技术(扬中)有限公司 Insulation impedance detection circuit and method for photovoltaic inverter
CN113252980A (en) * 2021-03-31 2021-08-13 华为技术有限公司 Optical storage system and ground insulation impedance detection method
DE102021127848A1 (en) * 2021-10-26 2023-04-27 Bender Gmbh & Co. Kg Method and device for detecting and locating short-term cyclic insulation faults in an unearthed power supply system

Citations (3)

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EP1143594A2 (en) * 2000-03-29 2001-10-10 Canon Kabushiki Kaisha Power converting apparatus, control method therefor, and solar power generation apparatus
US20110301772A1 (en) * 2010-06-07 2011-12-08 Zuercher Joseph C Protection, monitoring or indication apparatus for a direct current electrical generating apparatus or a plurality of strings
US20120048326A1 (en) * 2010-08-24 2012-03-01 Sanyo Electric Co., Ltd. Ground-fault detecting device, current collecting box using the ground-fault detecting device, and photovoltaic power generating device using the current collecting box

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US6593520B2 (en) * 2000-02-29 2003-07-15 Canon Kabushiki Kaisha Solar power generation apparatus and control method therefor
JP2002233045A (en) * 2001-02-02 2002-08-16 Canon Inc Ground detecting device for photovoltaic power generation system and method
US20060237058A1 (en) 2005-04-25 2006-10-26 Mcclintock Ronald B Direct current combiner box with power monitoring, ground fault detection and communications interface
EP2127064A4 (en) 2007-03-07 2014-07-30 Greenray Inc Data acquisition apparatus and methodology for self-diagnosis of ac modules
DE602007009878D1 (en) * 2007-06-08 2010-11-25 Abb Research Ltd TANDS OF A TEMPORARY POWER SUPPLY SYSTEM
US7751993B2 (en) * 2007-09-20 2010-07-06 Rockwell Automation Technologies, Inc. Technique for high-impedance ground fault detection at the common DC bus of multi-axis drives
US7764067B2 (en) * 2007-12-27 2010-07-27 Caterpillar Inc High voltage cable testing method
WO2009130201A1 (en) * 2008-04-21 2009-10-29 Abb Research Ltd Arc detector and associated method for detecting undesired arcs
US8279644B2 (en) * 2008-05-14 2012-10-02 National Semiconductor Corporation Method and system for providing maximum power point tracking in an energy generating system
US20110090607A1 (en) 2009-10-20 2011-04-21 Luebke Charles J String and system employing direct current electrical generating modules and a number of string protectors
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Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP1143594A2 (en) * 2000-03-29 2001-10-10 Canon Kabushiki Kaisha Power converting apparatus, control method therefor, and solar power generation apparatus
US20110301772A1 (en) * 2010-06-07 2011-12-08 Zuercher Joseph C Protection, monitoring or indication apparatus for a direct current electrical generating apparatus or a plurality of strings
US20120048326A1 (en) * 2010-08-24 2012-03-01 Sanyo Electric Co., Ltd. Ground-fault detecting device, current collecting box using the ground-fault detecting device, and photovoltaic power generating device using the current collecting box

Also Published As

Publication number Publication date
CN103901318A (en) 2014-07-02
CN103901318B (en) 2018-05-08
EP2750258A2 (en) 2014-07-02
JP2014128191A (en) 2014-07-07
EP2750258B1 (en) 2019-07-17
US9103865B2 (en) 2015-08-11
US20140176151A1 (en) 2014-06-26

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